In order of prevalence, the major heart problems were pulmonic stenosis (= narrowed vein channel), patent (open) ductus arteriosus, aortic stenosis (= narrowed artery channel) and ventricular septal defect (
hole in the heart muscle that separates its two lower chambers).
F is about the failures of the
heart muscle while
in A, for «aperture», a woman, Anna, finds a picnic table and —
in a plot worthy of Henry James's psychological fiction — discovers her name graffitied into it; she digs into the letters, creating a
hole with a creepy revelation.